I've been trying to setup a unidirectional @OneToOne relationship
between two entities, say EntityA and EntityB. Both use the same
@MappedSuperclass which has a composite primary key class using
@EmbeddedId.
I started with just this in EntityA:
@OneToOne(fetch=FetchType.LAZY)
public EntityB getEntityB() {...}
And that failed on having more than one writable mapping for a field.
Then I tried:
@OneToOne(fetch=FetchType.LAZY)
@PrimaryKeyJoinColumns({
@PrimaryKeyJoinColumn(name="col1", referencedColumnName="DBCOL1"),
@PrimaryKeyJoinColumn(name="col2", referencedColumnName="DBCOL2")
})
And a similar @JoinColumns with insertable=false, and updatable=false
variant. During deployment, it falls over with:
Exception [TOPLINK-0] (Oracle TopLink Essentials - 2.0 (Build b50-beta3
(06/06/2007))): oracle.toplink.essentials.exceptions.IntegrityException
Descriptor Exceptions:
---------------------------------------------------------
Exception [TOPLINK-60] (Oracle TopLink Essentials - 2.0 (Build b50-beta3
(06/06/2007))): oracle.toplink.essentials.exceptions.DescriptorException
Exception Description: The method [_toplink_setentityB_vh] or
[_toplink_getentityB_vh] is not defined in the object [com.foo.EntityA].
Internal Exception: java.lang.NoSuchMethodException:
com.foo.EntityA._toplink_getEntityB_vh()
Mapping: oracle.toplink.essentials.mappings.OneToOneMapping[entityB]
Descriptor: RelationalDescriptor(com.foo.EntityA -->
[DatabaseTable(T_TABLE)])
I've found a few bugs in TopLink wrt OneToOne and composite keys while
googling (all of which indicate they were fixed a few months ago), and
this:
http://forums.java.net/jive/thread.jspa?threadID=19638&tstart=0
Which is quite old and I assume fixed (and the workaround in the last
comment doesn't work either). Any ideas on the best way to define a lazy
one-to-one relationship with a composite PK involved? Using build50 of
GF-v2.
Cheers
Joe
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